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##############################################################################
#
# Lua syntax highlighting for Nano.
#
# Author:  Matthew Wild <mwild1 (at) gmail.com>
# License: GPL 3 or later
#
# Version: 2011-05-05
#
# Notes: Originally based on Ruby syntax rc by Josef 'Jupp'
Schugt
##############################################################################


# Automatically use for '.lua' files
syntax "lua" "\.lua$"

color brightwhite "\[\[.*\]\]"

# Operators
color brightyellow
":|\*|/|%|\+|-|\^|>|>=|<|<=|~=|=|\.\.|\<(not|and|or)\>"

# Statements
color brightblue
"\<(do|end|while|repeat|until|if|elseif|then|else|for|in|function|local|return|break)\>"

# Keywords
color brightyellow
"\<(debug|string|math|table|io|coroutine|os)\>\."
color brightyellow
"\<(_G|_VERSION|assert|collectgarbage|dofile|error|getfenv|getmetatable|ipairs|load|loadfile|module|next|pairs|pcall|print|rawequal|rawget|rawset|require|select|setfenv|setmetatable|tonumber|tostring|type|unpack|xpcall)\s*\("

# Standard library
color brightyellow
"io\.\<(close|flush|input|lines|open|output|popen|read|tmpfile|type|write|stdin|stdout|stderr)\>"
color brightyellow
"math\.\<(abs|acos|asin|atan2|atan|ceil|cosh|cos|deg|exp|floor|fmod|frexp|huge|ldexp|log10|log|max|min|mod|modf|pi|pow|rad|random|randomseed|sinh|tan)\>"
color brightyellow
"os\.\<(clock|date|difftime|execute|exit|getenv|remove|rename|setlocale|time|tmpname)\>"
color brightyellow
"package\.\<(cpath|loaded|loadlib|path|preload|seeall)\>"
color brightyellow
"string\.\<(byte|char|dump|find|format|gmatch|gsub|len|lower|match|rep|reverse|sub|upper)\>"
color brightyellow
"table\.\<(concat|insert|maxn|remove|sort)\>"
color brightyellow
"coroutine\.\<(create|resume|running|status|wrap|yield)\>"
color brightyellow
"debug\.\<(debug|getfenv|gethook|getinfo|getlocal|getmetatable|getregistry|getupvalue|setfenv|sethook|setlocal|setmetatable|setupvalue|traceback)\>"

# File handle methods
color brightyellow
"\:\<(close|flush|lines|read|seek|setvbuf|write)\>"

# false, nil, true
color brightmagenta "\<(false|nil|true)\>"

# External files
color brightgreen "\<(dofile|require)\>"

# Numbers
color red "\<([0-9]+)\>"

# Symbols
color brightmagenta "(\(|\)|\[|\]|\{|\})"


# Shebang
color brightcyan   "^#!.*"

# Simple comments
color green        "\-\-.*$"

# Multiline comments
color green         start="\-\-\[\[" end="\]\]"

# Strings
#color green
"\"(\\.|[^\\\"])*\"|'(\\.|[^\\'])*'"

# Strings
color red
"\"(\\.|[^\\\"])*\"|'(\\.|[^\\'])*'"

# color red         start="\[\[" end="\]\]"


# Hex literals
color red "0x[0-9a-fA-F]*"